1.是否定句之后通常用or代替and.

2.祈使句＋and =if,而祈使句＋or = unles.

3.有时 and与 or可换.

4.在选择疑问句中,用or 不用and.

5.在both 之后用and,在either之后用or.

Remember,keep a positive attitude and good things will happen.

记住：保持乐观的心态，好事自然会发生。

The world breaks everyone, and afterward, many are stronger at the broken places.

生活总是让我们遍体鳞伤，但到后来，那些受伤的地方会变得更坚强。

For what do we live, but to make sport for our neighbours, and laugh at them in our turn?

我们活着是为了什么？不就是给邻居当笑柄，再反过来笑他们。